1211321120202 has 48 divisors (see below), whose sum is σ = 2669749015752. Its totient is φ = 396827688960.

The previous prime is 1211321120057. The next prime is 1211321120213. The reversal of 1211321120202 is 2020211231121.

1211321120202 is a `hidden beast` number, since 1 + 21 + 1 + 321 + 120 + 202 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 225766572201 + 985554548001 = 475149^2 + 992751^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 883018 + ... + 1789514.

Almost surely, 2^{1211321120202} is an apocalyptic number.

1211321120202 is an abundant number, since it is smaller than the sum of its proper divisors (1458427895550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211321120202 is a wasteful number, since it uses less digits than its factorization.

1211321120202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907783 (or 907780 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 1211321120202 its reverse (2020211231121), we get a palindrome (3231532351323).

The spelling of 1211321120202 in words is "one trillion, two hundred eleven billion, three hundred twenty-one million, one hundred twenty thousand, two hundred two".